Holy Rust! Check your frames guys, I totally missed this! Toyota 4Runner Tacoma T100 Tundra Hilux

I thought we had picked up a rust free 4Runner, but after some accidental digging today, we discovered the right rear control arm area was rusted pretty badly. I realize this isn't "rust belt" level, but here in Tennessee, it's pretty bad. This is the only rusted area on the frame so I have to assume the neglected muffler is to blame. Check your stuff guys and maintain it!